Heap Profiling
--------------

This commit adds simple hp2ps-style heap profiling.  Just the '-h'
option is supported so far.

Heap profiles will show the top two cost centres on each cost centre
stack.

Time/Alloc profiles have been extended to aggregate the costs on a
per-cost-centre basis and show the table of highest consuming cost
centres before the full table of cost centre stacks.

Profiles work best if '-caf-all' is used, especially when using
one of the '-auto' flags.

Extra words about unsafePerformIO

A couple of fixes and cleanups to ticky-ticky profiling:

	- remove UPD_EXISTING (doesn't make sense)
	- add UPD_CON_IN_PLACE, now that we have in-place updates
	- clean up the output a little.

gcc 2.95 on Sparc changed the assembly output slightly.  This should
fix it.

GHC's web pages have moved to http://www.haskell.org/ghc/.

updated

Only use initUserSignals() if you've got it defined

GMP only depends on libiberty for the implementation of random().
Avoid this dep. on a (pure) Win32 platform.

Win32 version of awaitEvent(). Easy :)

oops, back out last change.  It was already there.

Fix building with profiling.

In case of a partial writes, buffer pointer wasn't being adjusted/used.

DLL install support

If DLL support enabled, add import libs to INSTALL_LIBS + DLL to INSTALL_PROGS

inputReady() and mingw - always return 1, not 0

Export toInt and fromInt from Int as well as from the (now uncool) rag-bag
that is GlaExts, since Hugs supports them too.

s/ZONE/get_ZONE/g

Re-ordered code so that the POSIX-blessed time() is used in preference
to the plethora of other clock reading calls. This *should* be an OK and
non-upsetting change, but idiosyncracies of OS-supplied header files may
just force me to rethink. We'll see..

Let's try again - added get_ZONE(), which retrieves current
timezone string. Need to do this since cygwin doesn't initialise
its tzname[] properly (=> need to call tzset() explicitly.)

timezone.h

Experimental support for re-routeing I/O on a Handle to that of another
for the duration of an IO action. Used to provide the following three
(exported) actions

   withStdin, withStdout, withStderr :: Handle -> IO a -> IO a

which 'replaces' one of the standard handles with that of the supplied
handle while performing the second action.

Documented Select interface ; removed old Pretty doc

Added hSelect

Fix run queue corruption bug, introduced in recent threadWait commit.

This fixes the "memo002 goes off into outer space" bug.

fromInt stuff

fromInt stuff

Add parse error/layout test.

Report layout parse errors as

	File.hs:10: parse error (possibly incorrect indentation)

Add test for line numbers/string gaps.

fix line number discrepancy w/ string gaps.

fromInt update.

get fromInt from the right place.

qualified import reg. test

updated

Verify that 'as' clause without 'qualified' brings both qual and unqual'ed name into scope

Test which verifies that special ids are correctly handled by the front-end

FFI decl tests

If -noC is used, don't compile the foreign-export C stubs

* On foreign decls, "ext_name"s are now optional. If missing, the ext_name
  is made equal to the Haskell name.
* Half a dozen special-ids were incorrectly handled when occurring as tyvars.

Fix default Enum methods